tiberti



G. o. TIBERTl,

ROTARY GAS ENGINE. APPLICATION FILED APR.26. ISH?.

3 2 SHEETS-SHEET I.

l Affornzy v l Imranor Specification of .getters Patent.

Patented July S, 1919.

.application led Apri126, 1917. Serial No. 164.708.

lic, ity known that i. (liisicrri: Onns're rlim-arri. subject ot the King ot italy, residing at Genoa, Italy. have invented certain new and useful Improvements inllotary (ias-Engines, of which the 'following is a spiazitication.

This invention relates to improvements 1n rotary internal combustion enjrines of the type in which the charge is.y drawn and compressed into a stationary compartment and afterward delivered into a second compartment. where it is exploded and discharged.

According to the'invention two rotors are concentric-ally mounted within two compartments ot elliptical shape and eachlrotor is provided with an even number ot' pistons which more radially in .said compartments. "lwo opposite pistons in one compartment simultaneously draw charges into that compartment while two other pistons in the same compartment act to' compress the charges previously introduced. The compressed charges are forced into the second compartment and there two opposite pistons, ot' that compartment, are contempor-aneously 'subjected to explosions.

Une of the principal objects ot' the invention is t provide a device et this character, which will entirely eliminate the neces/sity of employing valves, as the function of valves will be assumed by the. pistons.

[t further object of the invention is to provide the free end ot each piston with special means which will at all times tightly engage the elliptical walls of the compart-V ments Without permitting` leakage ot' the explosive mixture or gases past the, saine.

With the foregoing objects outlined and with other vobjects in view. my invention consists in the novel features hereinafter fleseribed in detail, illustrated in the ecompanyinpT drawings, and more particularly pointed out in the appended claims.

Referring t0 the drawing:

Figure l is a vertical. sectional view of my improved engine taken on the line 1-1 ot' Fig-2. i j

. Fig. 2 is a sectional View taken on the line Fig. 3 is a plan view ot the engine casing, with certain of the interior parts shown. diametrically in dotted lines.

Fig. et is a diagramn'iatie view showing the cycle of the motor.

ln the drawings .l designates the engine casing which is ot cylindrical shape and is provided on its interior with two chainbers l and 2, arranged parallel to each other. The chamber 2 has paralled side walls and s and the chamber l has similar walls al and 5. The chamber 2 has an elliptical wall T and the chamber '1 has a similar wall G.

It will be noted from Fig. l, that the elliptical chambers l and'2 are arranged in crossed position and that the longest dia1neter ot' the chamber 1 is at right angles to the longest diameter of chamber 2.

.Mounted centrally in the easing A is a shaft ll to which is fixed a rotor l2 formed ot' two circular disks l and 14. These disks are located in the chambers l and 2 and their sides are arranged parallel to the Walls 3, l and 5.

Packing's 8. 9 and 10 are arranged 'between the shaft 11 and the casing to prevent leakage.

Each one ol the disks 13 and 14 carry an even ninnber in radially movable pistons l, l5, 15C, 152,150, 152 l5, and 15, having movable heads 16, which are held in contact with the elliptical walls of the chambers. as the disks rot-ate, by means of coil springs l?. The heads 16 have their outer surfacesl machined and shaped between the minimum and maximum curvatures ot the elliptical walls t5 and '7. so as to have a maximum bearinex-on these walls at all times during' the rotation of the rotor. This shape can be clearly seen t'roin Fig. l.

Vthere are tour pistons carried by eac-h oi the dis-lis and these pistons are equally spaced on the.circumterences of the disks.

18 represents openingsI` communicating with tubes lt), by which the mixture ot' gas comin from the carbureter enters the chamber l at diainetrically opposite points closely adjacent the shortest diameter of the chamber. flutlet openings 21 for the compressed mixture are arranged diametrically opposite each other and closely adjacent the longest diameter of the chamber l. Passages-2O lead from the openings 2l to openf ings 22, arranged diametrically opposite td each other in the elliptical wall 7 of the chamber 2, and these openings are located substantially midway between the longest and shortest diameters of the elliptical wall as shown in Fig. l. Exhaust ports 23 for the chamber t?. pass through'the wall 'Y near its longest diameter and these ports are also arranged A(iiemetriceily opposite each other.

Thecasing A. is hollow, es shown et 24, for the purpose of otter eooling the some, and the periphery of' each disk 13-14is proyiflerl with e series ofcircuniferentialiy extending grooves 25, which permit explosive mixture to pass from the space formed vthe arrows shown in Figs. l and e, these pistons in moving; towerd. the openings 2l. will simultaneously drew the explosive mii;- ture into chamber l et two opposite points. r.This will continue until the last mentioned pistons rencle the position lll-H lullig. il, then es they :move pest the ports 2l, the mixture drawn in to chember l Will be compressed end forced. through the openings 2l, by the following istons l5encl if, which in moving ewey rom the openings 18 will drew mixture in on one sicle of the pistons and lee compressing the mixture., previously f rewu' in7 on the other side of the pistons. le.. other `words, after the rotor is in operetion. two opposite pistons in rotating, will loe drawing explosive mixture into the 'ehember l by 'the suction crested iii-clio Inovement of the pistone army from the openingsl 18, nucl they will also be compressing the previously lrewn in mire-ture lay-moving towerrl the openings 22.

.The compressed mixture is thus forced through the passages 20 to the openings 22 in the chamber 2 and -lietween pairs of successive pistons of that cheminer. When the pistons 15 enrl 15 in the chamber 2 cover the openings Q2, the explosion of the mixture between these pistons and the pistons lf and 15h telres piece in the parte of the chamber 2 marked 30, by means oir' suitelole speri; plugs (not shown). The pistons l5: sind 15*- reeeiving the force et' the explosionsa .et

the time of nlosion, are in the oositiou inrliceteil by line .HL-lll'. in Fig'. 4. The chambers olf explosion are formed in port by the curved surface of the disk lll; in part by the elliptical er' tace of the chamber 2: the wells ,lv-:md or casing; und by the sr `farces or edi-cent tous. llvf'lieu the in.. ture is exploded. it will flzive the rotor iu the direction infiicete by the arrows and the spent grasos will exhausted through the ports 23 (position iVm-TV oix Fig. 4.-.)

Y .The four pistons of the chamber i2 being 3. senseo grooves 25 from one of the crescent siinpefgl spaces to .the other and in consequence the trapped 'gases will loe mined with the incorning gases.

It Will be seen romFig. l that after the pistons l5 :incl 15h have passed the openings 22, the gas being forced into thechamber 2 will be led into 'spaces 25 which are open to the atmosphere through the exhaust porte 23, hut as the pistons-l5 and 15 more from the ports 22, tliey'will drew 'the explosive mixture with them enel thus prevent the mixture trom escaping through the ports From the foregoing iwill be, seen that e motor' constructed es set forth will produce eight explosions'rluring e single Vrotetion of the shaft, and the results ii'ili be similar te the ordinary four cycle engine hei/'ing eight cylinders.

TWhat claim and desire to secure by Letters Patent is:

^ l. A rot-ery internel combustion engine compris 1g e cesing provided with e pluralitil' oi chambers having parallel siale Wells anti elliptieel Vciroureferential Wells, which ere arranger?. in crossed relation rel-stiro to one another, the elliptical Well of one chember being provided with diemetricelly opposite openings forl the admission or the explosive mixture en'd with diametri-Telly opposite openings for the discharge of the compressed lmixture from seid chamber, passages connecting the discharge openings of the first Chamber in communication with inletopenings diemetricelly oppositely errenged in the elliptical well of the second chamber, rotatable disks mounted in seid. chambers and each carryingnn even number oi. pistons, and springs for forcing seid pistons toward seid elliptical wells, the pistons of' the two disks being arranged out ot' Q. A rotary 'internal combustion engine comprising a easing;v provided with e plurality ci parallel arranged chambers having parallel side Wells end elliptical circumferential Wells, the circumferential Well of one eheml'ier being` arranged in. crossed relation relative to the circumferential Well. of other chamber. (liumetricelly opposite .inlet ports vfor one chamber arranged in its 'elliptical well neer its shortest diameter, for edmitting explosive mixture to seid cheui'oer diemetrieelly opposite outlet ports arranged 1 in the last mentioned Wall near its largest placing saidy last mentioned openings in co1n- .5 municaton with diametrieally opposite openf -ings arranged .in the elliptical wall of the other chamber at points midway between the longest and shortest diameters of Vthe elliptical wall of the Second'chamber, a shaft eX- ]o tending through the casing, disks iXed to said Shaft and located in said chambers, an

even number of pistons carried by' each. of said disks and the pistons of each disk being larranged out of alii @nent with 'the pistons of the other disk, ans for forcing said 15 pistons toward the iptical walls ot' said chamber, and heads carried by said pistons and provided with a plurality of differently curved surfaces designed to snugly engage the elliptical Walls, as the disks rotate. 20

ln testimony whereof have all'ixed my signature in presence of two Witnesses.

GIUSEPPE -ORESTE TIBERTI, Witnesses: 1

ADOLFO LEIiER, ALFREDO ROG'GERO. 

